The number of neon tetras that can be kept in a 15-gallon tank depends on various factors such as the size of the fish, the filtration system, and the presence of other fish in the tank. Neon tetras are small fish that typically grow up to 1.5 inches in length and require a minimum tank size of 10 gallons. Therefore, a 15-gallon tank can comfortably accommodate up to 10-12 neon tetras.
It is important to note that neon tetras are schooling fish and should be kept in groups of at least 6-8. This means that a 15-gallon tank can house a single school of neon tetras. Overcrowding the tank can lead to stress, aggression, and poor water quality, which can be detrimental to the health of the fish.
In addition to the number of fish, the filtration system is also a crucial factor in determining the stocking capacity of the tank. A 15-gallon tank should have a filter that can handle at least 2-3 times the volume of the tank per hour. This ensures that the water quality remains stable and free from harmful toxins.
Lastly, it is important to consider the compatibility of neon tetras with other fish in the tank. Neon tetras are peaceful fish that do well with other small, non-aggressive species such as guppies, platies, and corydoras. It is best to avoid keeping them with larger, more aggressive fish that may bully or prey on them.
In conclusion, a 15-gallon tank can comfortably accommodate up to 10-12 neon tetras, provided that they are kept in a school, the filtration system is adequate, and they are housed with compatible tank mates. It is important to avoid overcrowding the tank and to maintain good water quality to ensure the health and well-being of the fish.
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